The Coupler Flange seals to a tube on both ends. These are used with our watertight enclosure tubes to connect multiple enclosures.
These coupler flanges are anodized aluminium and include dual radial O-rings for reliable high-pressure sealing, dual locking cord glands, and an anti-rotation feature. They come with PTFE locking cord and locking cord handles to secure the flange to the tubes. These flanges are only compatible with our watertight enclosure tubes, which have precision machined features at each end to interface with the flange.
Internal RAILS-compatible mounting holes make it easy to attach internal components securely

| Series Diameter | Radial Seal O-ring | Flange OD (E) | Piston Diameter (F) | Piston Length (G) | Overall Length (H) | Inner Mounting Hole Circle (J) | Weight | Part Number |
|---|---|---|---|---|---|---|---|---|
| 50 mm (2") | -031 Buna-N 70A | 58.0 ± 0.1 mm | 50.95 ± 0.05 mm | 15.5 ± 0.1 mm | 43 ± 0.1 mm | 43.0 ± 0.1 mm | 60 g | BR-106247 |
| 75 mm (3") | -150 Buna-N 70A | 88.9 ± 0.1 mm | 79.95 ± 0.05 mm | 19.1 ± 0.1 mm | 54 ± 0.1 mm | 68.6 ± 0.1 mm | 138 g | BR-106256 |
| 100 mm (4") | -154 Buna-N 70A | 114.3 ± 0.1 mm | 103.95 ± 0.05 mm | 19.1 ± 0.1 mm | 54 ± 0.1 mm | 94.0 ± 0.1 mm | 189 g | BR-106257 |
| Material: Aluminium 6061-T6, type III anodized for all flanges | ||||||||
| Locking Cord Diameter (D): 2.6 ± 0.4 mm for all flange sizes | ||||||||
| Inner Mounting Holes (I): M3x0.5 for all flange sizes | ||||||||
These coupler flanges are anodized aluminium and include dual radial O-rings for reliable high-pressure sealing, dual locking cord glands, and an anti-rotation feature. They come with PTFE locking cord and locking cord handles to secure the flange to the tubes. These flanges are only compatible with our watertight enclosure tubes, which have precision machined features at each end to interface with the flange.
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